=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for videoproto-2.3.1.tar.bz2
=> Checksum RMD160 OK for videoproto-2.3.1.tar.bz2
===> Installing dependencies for videoproto-2.3.1
=> Build dependency x11-links>=0.72: found x11-links-0.74
===> Overriding tools for videoproto-2.3.1
===> Extracting for videoproto-2.3.1
===> Patching for videoproto-2.3.1
===> Creating toolchain wrappers for videoproto-2.3.1
ERROR: zlib>=1.1.4nb1 is not installed; can't buildlink files.
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/x11/videoproto
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/x11/videoproto